Type-writer attachment.



Patenied June 4. 1918.

INVENTUR j?, Le@

IIN m9 QQ v\ BENJIMAN R. LEE, OF GHATTANOOGA, TENNESSEE.

TYPE-'WRITER ATTACHMENT.

Specication of Letters Patent.

Patented June 4, 1918.

Application led November 2, 1917. Serial No. 189,929.

To all 'whom it may concern:

Be it known that I, BENJIMAN R. Lan, a citizen of the United States, residing at Chattanooga, in the county of Hamilton and State of Tennessee, have invented certain new and useful Improvements in Type- VVriter Attachments, of which the following is a specification. l

This invention has relation to improvements in typewriting machines, and has for an object to provide an underscoring device operable automatically during the ordinary operation of the machine.

Another object of the invention is to provide an underscoring device for typewriting machines embodying an underscoring type movable into a position to be engaged by the type bar, whereby a dash is formed beneath the letter struck.

A still further object of the invention is to provide an underscoring device for typewriting machines, mounted to rest normally in an inoperative position with means for1 adjusting the device in an operative position to be engaged by the type bars in the manner described above.

A still further object of the invention is to provide an underscoring device for typewriting machines which is simple in construction comprising few parts, thereby permitting its manufacture at a low cost and enabling the device to be embodied in typewriting machines of standard makes.

In addition to the foregoing my invention comprehends improvements in the details of construction and arrangement o f the parts to be hereinafter more fully described and particularly set forth in the appended claims.

In the accompanying drawings in which similar and corresponding parts are designated by the same characters of reference throughout the several views in which they appear:

Figure 1, is a view in front elevation of the ribbon holder and correlated parts of a conventional form of typewriting machine illustrating the embodiment therein of my invention, and

Fig. 2, is a vertical section taken on the line 2 2 of the preceding figure.

I have illustrated in the accompanying drawin s a ribbon holder of a conventional form o typewriter, which consists of a pair of vertical guides 10stationarily mounted upon a portion 11 of the machine frame. A vertically movable plate 12 is mounted be* tween the guides having edges 13 turned over to form grooves to receive the guides 10, said plate 12 carrying fingers 14 at opposite sides in which the ribbon l5 is engaged. Suitable mechxanism'i's usually pro vided t) elevate the pla (112y vto raise the ribbon 14 in a positioniin ront of the platen for engagement by tlic type of the type bar to make the desired impression on the paper. The normal position of the plate 12 is down, thus lowering the ribbon and permitting uninterrupted view of the WritingI as it progresses.

For the purposes of my invention I provide a pair of slender rods 16 which may depend from the guide 10 to form guides for a vertically movable plate 17 having opposite vertical edges rolled as at 18 to receive the rod 16 therein. The plate 18 is formed with a vertical extension 19 having its upper end cut away as at 20 to form terminals 21 which are bent around a horizontal rod 22 forming a shaft. My underscoring device also includes an inverted U-shapcd type holder 23 having its arms 24 apcrtured to receive the rod 22 with one arm extended as at 25 to engage the outer face of the extension 19 of the plate 18. The type holder is thus mounted for pivotal movement,and the bight portion is provided with a type face 26 to engage the paper held upon the platen and the front face of the bight portion is provided with a`facing 27 of rubber or other material to form a cushion. A cnil spring 28 is then embraced about that portion of the rod 22 located between the arms 24 with one terminal of said spring engaging one of the arms and the other terminal the extension 19 whereby to normally retain the upper end of the tvpe holder away from the platen so as to avoid the ribbon when the plate 17 is elevated or depressed, or when the ribbon holder is elevated or depressed during a raised position of said plate 17 in a manner which will be presently obvious.

A pair of inwardly directed pins 29 are secured to the lower portion of the plate 17, and a rod 30 is provided having its forward end bifurcated as at 31 and each member of said bifurcated portion apertured to receive one of the pins 29. A pair of trunnions 32 are formed on said rod at a point intermediate its length, for support in a hearing 33 mounted on any stationary portion of the typewriting machine frame, while the rear cnd of the rod 30 is connected to a downwardly extending link 3l having its lower end pivotally connected to a key bar 35 which extends forwardly and is provided with a key 3G. It will be apparent that by depressing thc key 53o' motion will be transmitted from the key `oar through the link 34 and rod 30 to thc plate 1T, thus elevatingr the plateI and disposing the type 2G in a position to be engaged upon the platen. Any suitable device such as a lcvcr 37 may be provided to retain the key bar 35 in a depressed position. For this purpose l he inechanism usually provided to hold the shift key down will suliice.

In operation, and to use the underscoring device the key 3G is depressed whereby the plate 17 is elevated and the type face 26 thus positioned so as to engage thc platen and inscribe a dash at a point beneath the letter which is struck and formed simultaneously with the formation of the dash. It will be seen that the facing 27 ot the type holder is in a position to be directly engaged by the type bar indicated at 38 when the type holder' is in an elevated position. Thus, the dash and letter is formed simultaneously and each letter will thus be underscored automatically without the further attention of the operator, as long as the under- Scorin device is in an elevated position.

While I have illustrated and described my invention with some degree of particularity, I realize that in practice various alterations thercot may be made, and I therefore dcsire to rcscrve the right and privilege ot changing the forni of the details` of construetion, or otherwise altering the arrangement of the correlativo parts without departing from the spirit of the invention or the scope ot' the appended claims.

Having thus described my invention what I claim as new and desire to secure by Letters Patent iszl. In a typewriting machine, the combinat ion of an undcrscoring device including a vertically movable plate. a horizontalfrod carried by said plate,a type holder carrying an underseoring type pivotally mounted on said rod, a spring engaging the type holder to retain the salue normally in an outward position, means for limiting such outward movement, and means for elevating the plate to locate the type holder in a position to be engaged by each type bar to underscore each letter struck.

2. In a typewriting machine, the combination of an underscoring device including a vertically movable plate, a horizontal rod carried by the upper end of said plate, a type holder carrying an under-scoring type, said holdcr being in the form of an inverted U- |draped member having its terminals aperturcd to receive a rod. a coil springr encircling said rod. having one terminal engaging thc holder and the other the plate to retain the holder in a normally outward position, an extension on one ot' the arms of said type holder to engage the plate to limit the outward movclncnt of the type holder, and means for elevating the plate to be engaged by each type bar to underscore each letter; struck.

8. In a typewriting machine. the 'combi nation with the guides of the ribbon holder of a depending rod secured to eachiguide, a platcI having opposite vertical edges rolled over to engage the rods whereby to permit a. vertical movement. of said plate, a vertical cxtcnsion on said plate, a horizontal rod carricd atI thc upper end of said plate. a type holder substantially U-shaped having itsV terminals directed downward and apertured to receive. thc rod. a coil spring encircling said rod engaging the type holder to retain the same in normally outward position, an extension on said type holder engaging the plate to limit such outward movement, an under-scoring type carried by said type holder, a facing of resilient material on the front tace of said type holder. a rod fulcrumed at an intermediate point-and having its forward cud bifurcated and pivotally secured to the plate` a link depending from the opposite cnd and a key bar having a pivotal connection to said link whereby the plate may be clcvated upon depression of said key bar to locate the type holder in the position to be engaged hy each bar to ecord an underscoring character beneath each letter struck.

4.. ln a typevvriting machine. a plate mounted t'or vertical movement adjacent the rihbon supporting mechanism, a pair of upsl a nding members on said plate, a'pintle carricd between said upstand ing members, a U- shaped member having its terminals apertured to receive the pintle, an extension on one lterminal to engage the plate to limit outward movement of said U-shaped memher.` a type carried hy said U-shaped memhcr. a coil `spring encircling said pintle hav* ing one end connected to the plate and the other to the U-shaped member and means for elevating the plate to position the type tor the purpose set forth.

ln testimony whereof'I aix my signature in presence of two witnesses.

BENJIMAN R. LEE.

Witnesses WILLIAM B. CLEAGE, J. E. Tonsmnr. 

